Try to read pandas metadata in read_parquet if index_col is None. #1695
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HyukjinKwon
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Aug 3, 2020
HyukjinKwon
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Aug 4, 2020
HyukjinKwon
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Aug 4, 2020
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If a parquet file is stored by pandas, there is a metadata to describe index columns.
We can read it and use as
index_colif it's not specified.Resolves #1645.